Form for concrete floors and the like.



H. ERICSSON. foam-FOR CONCRETE fLooRs AND THE' UKL Ptented July 18, 1916.

' 2 sHEFTs-SHEET 1..

APPLICATION FILED MAY'26, 1910.

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HENRY ERICSSON, 0F CHICAGO, ILLINOIS.

FORM 'FOR CONCRETE FLOORS AND THE LIKE.

Specification of Letters Patent.

Patented July 18,1916.

Application filed May 26, 1910. Serial No. 563,502.

To all whom t may concern:

Be it known that I, HENRY ERICSSON, a citizen of the United States, residing at Chicago, in the county of Cook and State of Illinois, have invented certain new and useful Improvements in Forms for Concrete Floors and the like, of which the following is a description.

My invention relates to means adapted to be arranged in the space to be provided with the floor, adapted to receive the concrete and support the same in position until -it has fully hardened or set, after which my device may be removed leaving the floor in position. Y

The object of my invention is to provide a simple, convenient and eicient device of the kind described, adapted to form a floor of the greatest possible strength with the smallest amount of material. y

Tol this end my invention consists in the novel construction, arrangement and combination of parts herein shown and described, and more particularly'pointed out in the claims.

In the accompanying drawings wherein like or` similar reference characters indicate like or corresponding parts: Figure 1,v is a longitudinal section of a iioor showing myfforms in position, taken substantially on line 1--1 of Fig. 2. Fig. 2, is a section taken substantially on line 2-2 of Fig. 1. Fig. 8, is a bottom plan view of the same. Fig. 4, is a detail of a convenient latch or bar for'securing the elements of my device together. Fig. 5, is a longitudinal section of an eXtensible form of my device taken substantially on line 5-5 of Fig. 6. Fig. 6 is a section vtaken substantially on line 6-6 of Fig. 5. t

In the form shown in the drawings 1-1 are I beams arranged in the usual or any preferred manner floor. A plank or board 2 of suitable width is suspended below each I beam by hook-u bolts 3-3 or other convenient means for the purpose. As shown a stripvof wood or other material 4 is arranged at suitable intervals transversely of the board 2 vso-as to prevent its warping or splitting when in use and the hook-bolts 3-3 pass through the strips 4, thereby distributing the strain of the bolts across the entire width of the vat 9 upon one of the margins as 7 to -be embedded in the board 2. A pair of inclined strips 5-5 are secured to the upper face of the boards 2 at each edge, each strip being of suitable width to reachto the underside of the main body of the floor.v When thus arranged the several elements ofmy device are positioned between the I beams as shown in Fig. 1,

erably curved transversely in any desired manner to suit the peculiar conditions'of the floor to be constructed. As shown the edges of each plate are curved to form an ogee so arranged that the central portion of the plate will present the form of a slightly flattened arch with the extreme lmarginal edges 7 and 8 of the plates bent outward i'n a common plane to form the base of the arch. l

When in operative position the edges 7 and 8 of the elements 6 preferably overlap slightly, to close the space between the adjacent elements, and if desired a portion as may be set-olf vertically the thickness of the plate so that the upper surface of the marginal portions of the combined elements when in use will be flush. When thus constructedV the marginal portions of the elements operate to gage the spacing of the elements horizontally. They also indicate or gage the relative vertical positions of the elements. In the preferred form suitable means' are provided for rigidly maintaining the curved form of the element. As shown the eXtreme ends of each element are closed with a suitable inclined end 10 to which the sheet 6 is rigidly attached by screws, nails or other fastening means25 and a series of suitable frames or partitions 11 are spaced at substantially equal distances along the element and rigidly secured to the sheet l6 the same as the ends 10 to maintain its several parts in proper relation and prevent any spreading or twisting of the elements whenA the concrete fillingis applied. Inthe preferred construction` shown, a bar 12 of wood or other suitable material is provided for each 60 withthe ends of each element resting upon straight edge of' each element and rigidly Y secured thereto in any desired manner as by the screws, nails or other fasteners 26 to prevent the elements bending -longitudie nally when in service. preferably provided to rigidly connect the adjacent elements together when in operation. ln the form shown a plurality of latches or bars le are provided-for thisl purpose.- @ne end ofeach bar 14 is shown4 pivotally attached to a partition `l1 by a screw or bolt 15 and the opposite end of the bar l14 is notched as at 16 so that when the elements are in position the notched end of lthebar 14 may be engaged with a screw or bolt 17 -upon the partition of an adjacent form to positively space the elements and .Y

telescopeor slide longitudinally thereon so j as to control the total length of the element whichis thus constructed of two substantially similar parts.- rlhe extension 18 is substantially of the same form and con'- struction and is provided withan inclined end or closure 19 at its outer end, substantially the same in all respects as the main portion of the elements hereinbefore described. .The frames or partitions 11 areh however not usually required except where the extensions are of considerable length as the curved `vform of the extensions aremainl tained by their engagement with the main body'of the element; In this form a temporarysupport 20 is provided to hold the 'endofthe main element inposition and the extensions 18 rest upon and are supported by the strip 5 and vthe'niain'element jointly. ln operation the elements are arranged vin the'space between the beams 1-1 as hereinbefore described and as shown in Figs. l and 1 5.- One or more reinforcing rods 2li-22 are positioned in the depression between the elevso ments preferably with one end of each rod attached to the upper flange of a beam asshown-after which the concrete is filled in around the rods to the proper height above the'elements and its upper surface leveled oif and smoothedor otherwise finished as desired and allowed to set or harden after which the supports 20 and the boxing at each beam are taken down releasing theelements and permitting them to be1 readily removed, leaving a door consisting ofa series of arches extending between the beams, wlth rsuitable reinforcing means positioned in the bases of the arches and attached to the beams.`

Having thus described my improvement it is obvious that various immaterial modifications may be made 1n my device without departing from the spirit of my invention,

Suitable means are tiguous elements.

hence l do not wish to be understood as liniiting myself to the exact form or construe tion shown.

W hat ll claim as new and desire to secure,

.andf a longitudinal brace rigidly secured to eachl'of said strips in combination with a plurality `of partitions extending across each `element and .rigidlyA secured thereto, and

means cooperating with said brace torigidly connect the contiguous elements.

2. A device .of 'the kind described, comprising contiguous transversely curved two n 4part elements and a strip at each edge of each of said elements projecting laterally thereof vand adapted to coperate with a correspond ing part upon al similarly formed element to close the space between adjacent elements and a longitudinal brace rigidly secured to each of said strips7 in combination with a plurality of partitions extending across each element and rigidly secured thereto, and means attached to said partitions coperating with said braces to rigidly connect con- 3. A device of the kind described, comprising contiguous transversely curved sheet metal elements, a strip at each edge of each of said elements formed integrally therewith, projecting laterally therefrom and adapted to coperate with the corresponding part of a similarly formed element to close the space between adjacent elements, in coml -binationwith a plurality of partitions extending across each element and rigidly secured thereto and a partition at each extremity of the element, a Ylongitudinal bracey rigidly secured to each of said strips, and- IIleans for rigidly. locking the elements together.

4. A device of the kind described, `comprising a transversely curved two part element and a strip at each edge of said element projecting laterally thereof and adapted to coperate with a corresponding part4 upon a similarly formed element to close the space between adjacent elements and a longitudinal brace rigidly secured to each of said strips, in combination with means for rigidly maintaining the form of said element transversely and means for rigidly locking said .elements together.

5. A device of the kind described, comprising a transversely curved two part element and a strip at each edge of said element projecting laterally thereof and adapted to coperate with a corresponding part upon similarly formed element to close the space between adjacent elements, in combination In testimony whereof, I have hereunto with a plurality of transverse partitions and Signed my name in the presence of two sub- 10 longitudinal braces each rigidly attached' to soribing witnesses.

said element and adapted to jointly maintain 5 the form of said element both longitudinally HENRY y ERICSSON and transversely, and means upon said parti- Witnesses: i tions adapted to ooperate with said braces BURTON U. HILLS,

to rigidly look two of said elements together. BLANCHE CHALMERS. 

